An information handling system includes a DDR5 DIMM and a voltage regulator. The voltage regulator provides a voltage rail to the DDR5 DIMM. In a first mode, the voltage rail is based upon a pulse frequency modulation, and in a second mode, the voltage rail is based upon a forced continuous conduction mode). Selection of one of modes is based upon an input to the voltage regulator. When the information handling system is in a first state, the information handling system provides an input signal to the input to direct the voltage regulator to operate in the first state, and when the information handling system is in a second state associated with a sleep mode of the information handling system, the information handling system provides the first input signal to the first input of the voltage regulator to direct the voltage regulator to operate in the second state.
Legal claims defining the scope of protection, as filed with the USPTO.
2. The information handling system of claim 1, further comprising a Baseboard Management Controller configured in the first state to provide a second input signal to a second input of the voltage regulator to enable operation of the voltage regulator, and upon detection of a transition from the first state to the second state, to wait a predetermined duration, and after the predetermined duration, to provide the second input signal to disable operation of the voltage regulator.
3. The information handling system of claim 2, wherein the predetermined duration is ten milliseconds or more.
4. The information handling system of claim 1, further comprising a central processing unit configured in the first state to provide a third input signal to an input of the DDR5 DIMM to enable operation of the DDR5 DIMM, and in the second state to provide the third input signal to the input of the DDR5 DIMM to disable operation of the DDR5 DIMM.
5. The information handling system of claim 4, wherein the third input signal is associated with the sleep mode.
6. The information handling system of claim 5, wherein when the information handling system is in the first state, third input signal is in a high state, and when the information handling system is in the second state, the third input signal is in a low state.
7. The information handling system of claim 6, further comprising an inverter circuit configured to receive the third input signal at an input of the inverter circuit, and to provide the first input signal to the first input of the voltage regulator.
8. The information handling system of claim 6, further comprising a one shot circuit configured to receive the third input signal at an input of the one shot circuit, and to provide the first input signal to the first input of the voltage regulator.
9. The information handling system of claim 8, wherein the one shot circuit is further configured to provide a high state pulse as the first input signal in response to a transition of the third input signal from the high state to the low state, the high state pulse having a predetermined duration.
10. The information handling system of claim 9, wherein the predetermined duration is ten milliseconds or more.
13. The method of claim 12, wherein the predetermined duration is ten milliseconds or more.
15. The method of claim 14, wherein the third input signal is associated with the sleep mode.
16. The method of claim 15, wherein when the information handling system is in the first state, third input signal is in a high state, and when the information handling system is in the second state, the third input signal is in a low state.
19. The information handling system of claim 18, further comprising providing, by the one shot circuit, a high state pulse as the first input signal in response to a transition of the third input signal from the high state to the low state, the high state pulse having a predetermined duration.
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May 25, 2022
February 6, 2024
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